Bench-type gear-testing machine



P. M. MUELLER v BENCH H2B 'GEAR TESTING MACHINE idatented Get. Ei, i924.

MUELLER, OF HARTFORD, CONNECTICUT, ASSIGNOR T ERATT & WHITNEY COMPA'NY, 0F NEW YORKQN. Y., A CORPORATION 0F NEW JERSEY.

BENCH-TYPE GEAR-TESTING MACHINE.

Application led January 11, 19.22. Serial Fo. 528,469.

To all 'whom t may concern:

Ile it known that I, PAUL M. MUELLER, a citizen of the United States, residing at Hartford, in the. county of Hartford and State of Connecticut, have invented certain new and use-ful Improvements in Bench- Typc GearTesting liitachines, of which the following is a specification.

rlhis invention relates. to an improved form of gear testing machine. of the type disclosed in the application of H. D. Tan- 'nerferial No. 454,989,7or gear testing device, led March 24, 1921..l

An object. of the present invention is to provide a gear'testing device which will permit the gear being tested to be placed upon a plane surface provided on a base and oscillated or rolled past gear tooth engaging'mcmhers provided on the device adiustably fixed relative to the base.

Another object of the invention is to mount a gear testing device preferably of the type disclosed in the above referred to application upon a post or other support adjacent a table so that it may. be hold properly -in any desired vertical position and the gea;i tested by being rolled in contact there 'wit i Alfurther object of the invention is to mount the device upon the post or support in such a manner that a slight amount of angular movement may be permitted about an axis parallel to the haseso that the tooth engaging members of the device may contact 'properly along elements of the gear being tested.

Another object of the invention is to provide means to rigidlyv clamp the device to the support so that it may be prevented from osiilating, these means permitting the convenient clamping or unclamping of the device as desired.

With these and other objects in view, my invention consists in the features of con struction and operation setforth in the fol--` lowing specification and illustrated in the accompanying drawings.

In the accompanying drawings annexed hereto and forming a part ot this specification, I have shown my invention embodied in a bench type ot gear testing device for spur gears but it will be understood that the invention can be adapted for other forms of gears and that the drawings are not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

In the drawings:

Figure 1 is a plan view ofthe complete device forming the present invention;

Fig. v2 is an elevation of the same;

Fig. 3 is a sectional view of a part of the device taken on line 3-3 of Fig. 2.

In the above mentioned drawings, I have shown but one embodiment of the invention which is now deemed preferable but it is to be understood that changes .and modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

Briefly, my invention in its broadest aspeetk comprises the `following principal parts: first. a small bench'or table forming the base of the machine; second, a support fixed in position thereon and extending erpendicularly from the plane upper sur ace of the base; third, a gear testing device ad` justably mounted on the sup-port; fourth, a connection between the support and the gear testing device permitting limit/edc oscilla.- tionof the devicetrelative to its support about an axis normal to the support and parallel to the plane of the base; fth,

vmeans to rigidly "clamp the device to the support; and sixth, gear tooth contactin members on the testing device correspo ing in every way to the members in the gear testing device disclosed in the above referred to copending application.

Referring more in detail to the figures of the drawing.. the base 1' of the machine com.- prises a table or plate having an up er' plane surface 2. Near one end, preferahly on an extension 3 of the base is a support 4 lived in position on the base and extending perpendicularly from the plane 2' of the:A upper surface of the base. vAs shown in the h .rrureal this support 4 comprises a cylindrical post or rod which in the Aposition in which the device is normally used extends in a vertical or slighthTv inclined direction.

' On this support 4 is a clamping device comprising a split collar 5 which may be adjusted along the support 4 and clamped in any adjusted position thereon by means ofv the clamping screw 6, as shown. l

The gear testing device indicatedV generally at 7 compi'ises memhersasshown in the copending application referred to above,

Cil

i hyexibles rin ,mi vduring the testing operation may @com .rately determined.' The connection between end the body member of this device is :termed ipv-two spaced plates e and 9' to which'the geen' tooth contectin members() end 12 ere edjnstehly mounte One member l1G hnving 'n plane surface 1I sda, ted

to contee@ with 'e gear tooth surface is xed in ndjn'std position, and e member 12 havf ing-'e shrines 13 parallel 'to the plane lsurfe/ce 112i of the tiret member 10 is provided which moy be"aidjusted toward or from the first member b" v sdjustmentof theblock 14 end xed in e justed position by clamping screw .15. Also, thissecond member'l is cerried 16 end l? so that its position is' resi int y adjustable and is yheld with'its surface 13' always erallel to the tooth contacting surfers 11' o the first lmerriber 10. By ineens of e dial indicator or other iorrn of position indicator 2O the position oi this second contacting member 12 the second member 12 end the diei indicator 20 is by e multiplying lever 131 so' thet' minute movements of the member nre readily cbserved. A third eer tooth ccntecting member 22 is meente on the o first member 10 end is help in any adj usted position by means of e clamping screw 23, so

' etesto always' hold the geen with its tooth,

esshovvn; This contacting member 22 opereuzfeces in contnctwith surfaces 11 end '13' of the other members .10 end 12. The two .perellel contacting surfaces 1i and 13 of the' tooth contacting'members 10y end 12 and member 22 just described comprise three sur#- fem of e recit, two surfaces being on corresonding sides of adjacent teeth and the t ird surface on the opposite side of another tooth. By the adjustments shown, the devvice maybe adapted for testing geers having' Widely diiierent pitches. A. gear A 1s shown: in the figures in position for testing.

It 'is obvious thet if the contacting sur- 'faces'll end 13 of the tooth engaging members were not. lroperh,Y mounted Oon the su .port then un er certain circumstances t c' Contact between the flanks of the gear teeth and the testing ydevice would not be along lines extending parallel, to thel pitch elelfnents of the gear teeth. i 7i therefore permite slight oscillation of thedevico Ltogether 'with the tooth/contacting members 1() and 12 so'thet the surfaces 11 end 13 may adjustr themselves easily into correct osition to engage the gear teeth. I accom ish this by providingl a stud or screw outstanding from the `coller 5 adjustable along the support 4, the stud 25 extending in an exis normal to the exis of the support d end ltherefiere parallel to the piene surface 2 ci the bese 1., v inserted between the two 4nietes 8 and v*Si forming the Eddy member *I 'of the testing device is n block tired in position thereon by screws il?, es 'eher/n.. The stud Vscrew 35, es shown.

in combination, a. bases support fix .mounted on seid snp :terence 25-extends easily through e hole provided 1n this blockg. ln this way, the gecrtcsting device 7 may be osc'iilatecl about an axis,4 parallel to the plane of the base to ad just or tilt the tooth contacting surfacesll and 13 of the device 7 into correct engaging position. To limit this oscillating movement, I mount a. small pin 30 in the cleming collar `5, the" outstanding enflof Whic enga es an arcuate slot or hole 31 lformed in t e block 26 'fastened in position between, 'the plates of the geel' testingde-V operation. I t erefore mounts, yber or rod 33 in this block' extendin a'sshown in a directicnoppoeite to that -o the weight of llgslzion on' the support the device. On this ber'or rod I mount a i' counterweght 34, the position of which may I be cdjuste along the rod 33, and clamped in adjusted positionv thereon by ineens of` thel the device 7 to its' support V4 so that it may not'be oscillated. To accomplish this, E ro' vide the .rodV 33 with screw threads 3 so. that by rotation of this rod 33 the forward end thereof mcy be forced against the stud 2`5thus holding'the device 7 rigidly to the A stud 25 end .preventing any osoil'lntion.l f 4Preferably 'an orice 40 1s Aformed in the bose 1 directly under the position assumed f by the tooth engaging members on the de-. vice 7. This permits e light yto be placedbelow the base thus enabling the contact of the gear teeth with the contacting members y to be more rsedill'fyT observed.

' What I' claim 1s:

L' dvicofgr testing gears in combina/tion, e bese, s support fixed' thereto, und a, gear testing device mounted on said support, seid device having gear tooth engsging members moveblereletively to each lill other and edepted to .engage sides of teeth i of a. gear positioned on said base, seid mem- 'bers engaging the gear being; tested upon' straight lineelements of the booth surface.

2. A device for testing gears com rising thereto, end e gear testing device 'adjustably rt, seid device hav ing geur tooth engaging members ,movable relativelyl to each other and adapted to' engege sides of'teethoi a. gear positioned on seid bese., .said members engegin the gearI losing tested upon straight line e ements of the tooth surface.

3. device for testing goers comprising in combination, e heee, e Support fixed there to, end s geer testing device edjnstobly mounted en seid cupmrt, seid device herring lun nio

- tively to eachother and a gear tooth engaging memb rs movable rela- `aptedto engage corresponding sides of adjacent teeth of a gear'positioned on said base, said members engaging the gear being tested upon straight line elements of the tooth surface.

4. A device for testing gears .comprising in combination,A a base, a support fixed thereto, a gear testing device adjustably mounted on said support, said device having gear tooth engaging members adapted to engage corresponding sides of adjacent teeth of 'a gear positioned on said base, and means permitting said device to be tilted about an axis parallel to a plane surface on said base.

5. A device for testing gears comprising in combination, a base, a supportfixed thereto, and a gear testing device adjustably and oscillatably mounted on said support, said device having gear tooth engaging members adapted to engage sides of teeth of a gear positioned on said base.

6. A device for testing gears comprising 'in combination, a base, a support extending in a direction normal to said base, a gear testing device adjustably mounted on said support, gear tooth engaging members on said device having their engaging surfaces extending approximately normally to the plane of the base and adapted to engage sides of teeth of a gear positioned on said base7 and means permitting limited oscillation of said testing device about an axis parallel to said base.'

7. A device for testlng gears comprising Ain combination7 a base, a support extending in a direction normal -to said base, a gear testing. device adjustably mounted on said support, adjustable gear tooth engaging members on said device having' their engag ing" silrfaces extending approximatel normally. to the plane of the base and a apted to engage corresponding sides of teeth -f a"'gear posltlonedV on said base, and means permitting limited oscillation of said testmng device about an axis parallel to said base.

8. A device for testing gears comprising' tending parallelly to each other and being approximately normal to the plane of the base, said surfacesv being adapted to engage corresponding sides of teeth of a gear positioned on said base, and means permitting limited .oscillation of Said testing devicel about an axis parallel to said base.

In testimony Whereofyl hereto aix` my I signature.

PAUL M. MUELLER. 

